Dishwasher Spray Arm Joint for Stable Auxiliary Rotation
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Solution Overview
Problem
Existing dishwashers face challenges in maintaining the strength and stability of auxiliary arms, preventing sagging and foreign substance accumulation, while ensuring efficient water supply and rotation, which can lead to coupling issues and reduced effectiveness in washing.
Innovation Solution
The dishwasher incorporates a main arm with an auxiliary arm connection member that includes a flow tube, support ribs, and a departure prevention part to rotatably mount the auxiliary arm, ensuring it remains connected and functional, with features like reinforcement ribs and angled support surfaces to guide water flow and prevent warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the auxiliary arm is made rotatable on the main arm to improve washing coverage, then the adaptability is improved, but the stability and strength of the auxiliary arm connection deteriorates
Solution Approach 1:
The auxiliary arm connection member is divided into multiple functional components: a flow tube for water supply, a shaft for rotation, support ribs for structural strength, and a departure prevention part for maintaining connection. This segmentation allows each component to perform its specific function while collectively solving the contradiction between rotatability and connection strength.
Solution Approach 2:
The shaft is inserted into the auxiliary flow passage, and the support ribs connect the flow tube to the shaft, creating a nested structure. The auxiliary arm rotates on the shaft while the support ribs provide structural support, enabling both rotation and strength to coexist.
2Strength
If the auxiliary arm connection member includes multiple support ribs to prevent sagging, then the strength is improved, but the device complexity increases
Solution Approach 1:
The support ribs serve multiple functions simultaneously: they provide structural strength to prevent sagging, guide water flow through integrated flow holes, and support the shaft. By merging these functions into a single component, the design achieves strength without proportionally increasing complexity.
Solution Approach 2:
The support ribs are designed as multi-functional elements that provide mechanical support, guide fluid flow, and maintain structural integrity. This multi-functionality reduces the need for separate components, balancing strength requirements with device complexity.
3Ease of operation
If the shaft is inserted into the auxiliary flow passage to enable rotation, then the ease of operation is improved, but foreign substances may accumulate on the connection member
Solution Approach 1:
The auxiliary arm is designed to be rotatable on the main arm through the shaft insertion, creating a dynamic connection that allows the arm to move and adjust its position. This dynamic design improves ease of operation for different washing angles while the support ribs prevent foreign substance accumulation by maintaining proper flow paths.
Data Source
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AI summary
The present invention relates to a dishwasher (1). According to an aspect, a dishwasher (1) includes a main arm (110) through which wash water flows, an auxiliary arm (140, 150) rotatably disposed at the main arm (110) to spray the wash water, and an auxiliary arm connection member (160) disposed at the main arm (110) to rotatably support the auxiliary arm (140, 150), wherein an auxiliary flow passage (141) through which the wash water flows is formed in the auxiliary arm (140, 150), a transfer flow passage communicating with the auxiliary flow passage to supply the wash water is formed in the main arm (110), and the auxiliary arm connection member (160) includes a flow tube disposed at the main arm to communicate with the transfer flow passage and the auxiliary flow passage, a shaft (166) inserted into the auxiliary flow passage, a protrusion (168) protruding from the shaft, and at least one or more support ribs (165a, b, c) configured to connect the flow tube to the shaft to support the shaft, and a departure prevention part (145) coming in contact with the protrusion to prevent the departure of the auxiliary arm is disposed at the auxiliary arm.